Perfect Circle MS909P Main Bearing Set Small Block Chevy Standard Size

The Perfect Circle MS909P is a premium main bearing set designed for Small Block Chevrolet V8 engines. This P-Series standard size bearing kit is engineered to deliver reliable performance in both stock and performance applications.

Key Features:

• Tri-metal construction with cast copper-lead for superior strength and durability
• Increases fatigue strength by approximately 20% compared to powdered metal processes
• Suitable upgrade from bi-metal engine bearings due to increased load capacity
• Steel backed bearings with intermediate layer of copper-lead alloy and electroplated lead-tin-copper overlay
• Contains 1/2 grooved bearings for "Medium" journal engines
• Additional embed ability makes it a good choice for older engines

Ideal for rebuilding engines where more demanding use is anticipated, such as heavy duty, motorsports, or street performance, and suitable for most OE applications. The tri-metal design provides a margin of forgiveness for vehicles that may not receive maintenance as frequently as recommended, making this bearing set an excellent choice for both restoration and performance builds.